package com.walmartlabs.concord.runtime.v2.runner;

/*-
 * *****
 * Concord
 * -----
 * Copyright (C) 2017 - 2020 Walmart Inc.
 * -----
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * =====
 */

import com.walmartlabs.concord.svm.Runtime;
import com.walmartlabs.concord.svm.*;

public class SynchronizationServiceListener implements ExecutionListener {

    private final SynchronizationService delegate;

    public SynchronizationServiceListener(SynchronizationService delegate) {
        this.delegate = delegate;
    }

    @Override
    public Result afterCommand(Runtime runtime, VM vm, State state, ThreadId threadId, Command cmd) {
        if (delegate.hasPoint()) {
            state.setStatus(threadId, ThreadStatus.SUSPENDED);
            return Result.BREAK;
        }

        return Result.CONTINUE;
    }

    @Override
    public Result afterEval(Runtime runtime, VM vm, State state) {
        if (!delegate.hasPoint()) {
            return Result.BREAK;
        }

        return Result.CONTINUE;
    }

    @Override
    public Result afterWakeUp(Runtime runtime, VM vm, State state) {
        delegate.maintain();
        return Result.CONTINUE;
    }
}
